Buggy code:
public class TestNumericRangeQuery64 extends LuceneTestCase { private static long distance ; private static final long startOffset = ( - 1L ) << 31 ; private static int noDocs ; private static Directory directory = null ; private static IndexReader reader = null ; private static IndexSearcher searcher = null ; @ BeforeClass public static void beforeClass ( ) throws Exception { } @ AfterClass public static void afterClass ( ) throws Exception { } @ Override public void setUp ( ) throws Exception { } private void testRange ( int precisionStep ) throws Exception { } @ Test public void testRange_8bit ( ) throws Exception { } @ Test public void testRange_6bit ( ) throws Exception { } @ Test public void testRange_4bit ( ) throws Exception { } @ Test public void testRange_2bit ( ) throws Exception { } @ Test public void testInverseRange ( ) throws Exception { } @ Test public void testOneMatchQuery ( ) throws Exception { } private void testLeftOpenRange ( int precisionStep ) throws Exception { } @ Test public void testLeftOpenRange_8bit ( ) throws Exception { } @ Test public void testLeftOpenRange_6bit ( ) throws Exception { } @ Test public void testLeftOpenRange_4bit ( ) throws Exception { } @ Test public void testLeftOpenRange_2bit ( ) throws Exception { } private void testRightOpenRange ( int precisionStep ) throws Exception { } @ Test public void testRightOpenRange_8bit ( ) throws Exception { } @ Test public void testRightOpenRange_6bit ( ) throws Exception { } @ Test public void testRightOpenRange_4bit ( ) throws Exception { } @ Test public void testRightOpenRange_2bit ( ) throws Exception { } @ Test public void testInfiniteValues ( ) throws Exception { } private void testRandomTrieAndClassicRangeQuery ( int precisionStep ) throws Exception { } @ Test public void testEmptyEnums ( ) throws Exception { } private int countTerms ( MultiTermQuery q ) throws Exception { final Terms terms = MultiFields . getTerms ( TestNumericRangeQuery64 . reader , q . getField ( ) ) ; if ( terms == null ) return 0 ; final TermsEnum termEnum = q . getTermsEnum ( terms ) ; assertNotNull ( termEnum ) ; int count = 0 ; BytesRef cur ; BytesRef last = null ; while ( ( cur = termEnum . next ( ) ) != null ) { count ++ ; if ( last != null ) { assertTrue ( ( ( last . compareTo ( cur ) ) < 0 ) ) ; } <START_BUG> last = new BytesRef ( cur ) ; <END_BUG> } return count ; } private void checkTermCounts ( int precisionStep , int termCountT , int termCountC ) { } @ Test public void testRandomTrieAndClassicRangeQuery_8bit ( ) throws Exception { } @ Test public void testRandomTrieAndClassicRangeQuery_6bit ( ) throws Exception { } @ Test public void testRandomTrieAndClassicRangeQuery_4bit ( ) throws Exception { } @ Test public void testRandomTrieAndClassicRangeQuery_2bit ( ) throws Exception { } @ Test public void testRandomTrieAndClassicRangeQuery_NoTrie ( ) throws Exception { } private void testRangeSplit ( int precisionStep ) throws Exception { } @ Test public void testRangeSplit_8bit ( ) throws Exception { } @ Test public void testRangeSplit_6bit ( ) throws Exception { } @ Test public void testRangeSplit_4bit ( ) throws Exception { } @ Test public void testRangeSplit_2bit ( ) throws Exception { } private void testDoubleRange ( int precisionStep ) throws Exception { } @ Test public void testDoubleRange_8bit ( ) throws Exception { } @ Test public void testDoubleRange_6bit ( ) throws Exception { } @ Test public void testDoubleRange_4bit ( ) throws Exception { } @ Test public void testDoubleRange_2bit ( ) throws Exception { } private void testSorting ( int precisionStep ) throws Exception { } @ Test public void testSorting_8bit ( ) throws Exception { } @ Test public void testSorting_6bit ( ) throws Exception { } @ Test public void testSorting_4bit ( ) throws Exception { } @ Test public void testSorting_2bit ( ) throws Exception { } @ Test public void testEqualsAndHash ( ) throws Exception { } }

Fix:
last = BytesRef . deepCopyOf ( cur ) ;